振幅、相位、进动角速度在过临界后的波动频率随转速增加而增加。
The minimum and maximum of amplitude fluctuation correspond with the minimum of precession speed after the critical point on the response curve.
该判据用永久转动角速度的大小而不是进动角速度的大小作为判别准则，较为合理。
This criterion is reasonable because it is not expressed in terms of the precessional velocity, but the angular velocity of the permanent rotation.
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